针对复杂建筑内疏散通道等部位的抑烟和防火分隔问题,通过建立细水雾幕防火抑烟模拟实验台,初步研究了细水雾幕抑制火灾烟气的效果.结果表明,细水雾幕对火灾烟气具有很好的抑制作用,在2.0 MPa细水雾幕施加的情况下可使火场烟气的光学密度降低80%,能见度从1.8m提高到9.5 m;使火场温度降低62%;使烟气穿过细水雾幕的时间延迟40 s,从而能够有效阻挡烟气,为人员安全疏散提供安全的环境条件和充足的时间.
Aiming at fire smoke control and fire compartmentation inside complex buildings, such as the evacuation passageway, fire smoke controlled by water mist was studied through setting up an experimental platform containing the water mist curtain system. The results indicate that under the effect of 2.0 MPa, water mist curtain can bring about 80% reduction of smoke density optical and 62% reduction of smoke temperature. It can promote visibility of the protected area from 1.8 m to 9.5 m. Smoke passing through the curtain experimences a 40 s delay. The water mist curtain proves to effectively control fire smoke and leave enough time for evacuation.